TY - GEN AU - Herbert B Brooks C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1935-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.408 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1935 TI - Circular of the Bureau of Standards no. 408::information for the amateur designer of transformers for 25- to 60-cycle circuits ER -